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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Synergistic Modification for Efficient Perovskite Solar Cells with Small Voltage Loss
You He1,2, Hua Dong3, Cong Chen4
1Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin 541004, China.
ACS Applied Materials & Interfaces
|October 26, 2023
Summary
Researchers enhanced perovskite solar cell efficiency by minimizing energy loss using a synergistic modification strategy. This approach improved power conversion efficiency (PCE) to 24.07% and demonstrated good device stability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) show rapid power conversion efficiency (PCE) improvements but remain below theoretical limits.
- High energy loss (E_loss) is a critical factor hindering further PCE enhancement in PSCs.
Purpose of the Study:
- To develop a synergistic modification strategy to minimize energy loss (E_loss) in PSCs.
- To enhance the photovoltaic performance and stability of perovskite solar cells.
Main Methods:
- Synergistic modification of the SnO2 layer using RbCl and potassium polyacrylate (K-PAM).
- Introduction of Pb(Ac)2 into PbI2 to improve perovskite film quality.
- Characterization of defect reduction, energy-level alignment, and photovoltaic performance.
Main Results:
- Reduced defects in SnO2 and perovskite layers.
- Improved energy-level alignment between layers.
- Achieved a maximum PCE of 24.07%, significantly higher than the control device's 20.86%.
- Minimized energy loss (E_loss) to 0.349 eV.
- Demonstrated good device stability.
Conclusions:
- The synergistic modification strategy effectively reduces energy loss in PSCs.
- This approach leads to significantly enhanced PCE and improved device stability.
- The findings offer a promising pathway for developing high-performance perovskite solar cells.
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